John Legend could not hold his tongue. On Wednesday (March 8), which happened to be International Women's Day, the singer was so incensed by a comment he read by Fox News anchor Bill O'Reilly he had to go all in on the O'Reilly Factor host.

She's not your granddaughter, Billy. She's a seasoned journalist asking important questions. You should take notes. https://t.co/6RrISQgsEo

- John Legend (@johnlegend) March 9, 2017

Mitchell, who has been a reporter for 50 years, attempted to ask Tillerson a question during a photo op with Ukranian Foreign Minister Pavlo Klimkinon on Tuesday, inquiring about Chinese threats of retaliation for U.S. anti-missile defenses in South Korea. She was ushered out fo the room after making the inquiry.

Legend wasn't the only one who backed up Mitchell for her determined reporting.

This is really great to watch @mitchellreports push for details. One of the hardest working people in television https://t.co/TaJMvaAw7h

- Mark Meredith (@markpmeredith) March 8, 2017

You guys. This happened today.

This is why we ❤️ Andrea @mitchellreports. There is nobody more dogged, more tenacious. The best. pic.twitter.com/uINDWmOYEM- Bradd Jaffy (@BraddJaffy) March 7, 2017